they explain here about how we sweat. I read the specs and went to REI to purchase a very pricy raincoat.
REI's Kulshan Jacket. I had to order it from the warehouse so that I didn't have to choose the neon lime green one, the only Medium in the store. It's got a nice hood and there's enough room underneath for me to add a fleece lining. I read the reviews and most people liked it, but some weren't happy with the zipper. I mentioned that to the salesperson as I checked out, and he told me he thinks that was last year's design. The good thing about REI is if I don't like it, or if it doesn't work as advertised, I can take it back and get a full refund. Other reviews of the fabric were very positive.
I'll let you know how it works in future posts. I didn't think I would ever be anxious for more rain, but...